These raw data files are seismograms of the 7 Jan 1998 Sierra Chemical Co. "Kean Canyon Explosion" recorded at 3 UNR digital stations. They are in SAC ASCII and binary format. Components are Z or V=up-down N=north-south E=east-west. See Paper at http://www.seismo.unr.edu/SierraChemical for station locations. These seismograms are not instrument corrected. See my web site for source code and links for processing seismograms.

• Sac binary files for big indian platforms (i.e. UNIX platforms)
  • WCN Z Guralp CMG40
  • WCN N Guralp CMG40
  • WCN E Guralp CMG40
  • PAH Z Guralp CMG40
  • PAH N Guralp CMG40
  • PAH E Guralp CMG40
  • WAK Z Teledyne GS13
  • WAK N Teledyne GS13
  • WAK E Teledyne GS13
• Sac ASCII
  • WCN Z Guralp CMG40
  • WCN N Guralp CMG40
  • WCN E Guralp CMG40
  • PAH Z Guralp CMG40
  • PAH N Guralp CMG40
  • PAH E Guralp CMG40
  • WAK Z Teledyne GS13
  • WAK N Teledyne GS13
  • WAK E Teledyne GS13

Here is the C structure of header/data. The header has a total of 632 bytes. 4 byte Floats and 4 byte longs are a total of 440 bytes and there are 192 2 byte characters. Data follows and stored as 4 byte floats. See the SAC web site for definitions.

struct sac {
float   delta,     depmin,    depmax,    scale,     odelta;
float   b,         e,         o,         a,         internal1;
float   t0,        t1,        t2,        t3,        t4;
float   t5,        t6,        t7,        t8,        t9;
float   f,         resp0,     resp1,     resp2,     resp3;
float   resp4,     resp5,     resp6,     resp7,     resp8;
float   resp9,     stla,      stlo,      stel,      stdp;
float   evla,      evlo,      evel,      evdp,      unused1;
float   user0,     user1,     user2,     user3,     user4;
float   user5,     user6,     user7,     user8,     user9;
float   dist,      az,        baz,       gcarc,     internal2;
float   internal3, depmen,    cmpaz,     cmpinc,    unused2;
float   unused3,   unused4,   unused5,   unused6,   unused7;
float   unused8,   unused9,   unused10,  unused11,  unused12;
long    nzyear,    nzjday,    nzhour,    nzmin,     nzsec;
long    nzmsec,    internal4, internal5, internal6, npts;
long    internal7, internal8, unused13,  unused14,  unused15;
long    iftype,    idep,      iztype,    unused16,  iinst;
long    istreg,    ievreg,    ievtyp,    iqual,     isynth;
long    unused17,  unused18,  unused19,  unused20,  unused21;
long    unused22,  unused23,  unused24,  unused25,  unused26;
long    leven,     lpspol,    lovrok,    lcalda,    unused27;
char    kstnm[8],  kevnm[16];
char    khole[8],  ko[8],     ka[8];
char    kt0[8],    kt1[8],    kt2[8];
char    kt3[8],    kt4[8],    kt5[8];
char    kt6[8],    kt7[8],    kt8[8];
char    kt9[8],    kf[8],     kuser0[8];
char    kuser1[8], kuser2[8], kcmpnm[8];
char    knetwk[8], kdatrd[8], kinst[8];
};

#include "stdio.h"
#include "sac.h" /* above structure definition */

main()
{
	struct sac header;
	float  data;
	FILE *fp;
	
	.
	.
	.

	fp = fopen(sacfilename, "rb");                    /* open file */
	fread(&header, sizeof(struct sac header), 1, fp); /* load sac header */
	fread(&data[0], header.npts*sizeof(float), 1, fp); /* load array data of 0 to npts-1 */

	.
	.
	.
}